US2476637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing chloroformates
Assignee: PPG Industries Inc
•
Filing: 1947-02-28
•
Granted: 1949-07-19
•
Expires: 1967-02-28
Abstract
No abstract record available.
Inventors
- 👤 Strain Franklin
- 👤 Wilbert F Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:17
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/96; C07C68/00; C07C68/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1618824A
Cited
US1955873A
Cited
US2010841A
Cited
US2136178A
Cited
US2370568A
Cited
US2397630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |